Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B7/00—Other common features of elevators
  • B66B7/02—Guideways; Guides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/0043—Devices enhancing safety during maintenance
  • B66B5/005—Safety of maintenance personnel
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
  • B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06C—LADDERS
  • E06C7/00—Component parts, supporting parts, or accessories
  • E06C7/12—Lifts or other hoisting devices on ladders
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06C—LADDERS
  • E06C7/00—Component parts, supporting parts, or accessories
  • E06C7/16—Platforms on, or for use on, ladders, e.g. liftable or lowerable platforms
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06C—LADDERS
  • E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
  • E06C9/02—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes rigidly mounted
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
  • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
  • F03D80/50—Maintenance or repair
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B10/00—Integration of renewable energy sources in buildings
  • Y02B10/30—Wind power
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/70—Wind energy
  • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

• Lift especially for mounting on a substantially vertical building and security arrangement for said lift
• the invention relates to a lift especially for mounting on a substantially vertical building section and comprising a lift cage which is displaceably controlled by at least one guide rail being essentially vertical in the position of use and comprising a drive motor for co-operating with a carrier wire.
• the lift can be used for materials or persons in particular in connection with establishing access to building sections in view of for example service of installation (inspection lift) or in connection with construction work (construction site lift).
• a lift of this kind is known from e.g. W092/18412 and US 3 908 801 where the guide rails are integrated with a service ladder. Both documents also disclose a possibility for getting out of the lift cage, e.g. in case of malfunctioning, and out on that side of the ladder where the lift cage is moving.
• the service ladder has spacer consoles being positioned in mutually spaced relationship, which serve as fixation means for the service ladder in a predetermined position relative to the building section so that spacer consoles, the ladder, and the building section define an area of action for the service ladder outside the path of motion of the lift.
• spacer consoles, the ladder and the building section are used for defining a safe zone of movement for persons so that both the real and the felt safety are enhanced.
• Claims 2-4 set forth various possible arrangements for the construction, and irrespective of these variants latitude of movement between the lift cage and that side of the service ladder where it is the safest to move about is obtainable in a safe way by means of the step mentioned in claim 5.
• the plane of the ladder may coincide with the plane of the guide rails, but these two planes can form an arbitrary mutual angle.
• the lift cage has a number of guide rolls or glide shoes co-operating directly with the side members of the service ladder in such a manner that the spacer consoles are clear of the path of motion of the guide rolls or the glide shoes.
• there may be disengagement means for the guide rolls or the glide shoes thus allowing easy disengagement of the lift cage from the guide rails.
• a rail may be provided for co-operation with a safety wire, and finally in a preferred embodiment the lift cage comprises drive motor and appertaining control and safety equipment.
• the lift cage can advantageously comprise a gangway flap, and in a preferred embodiment this gangway flap is provided by means of a downwardly foldable side portion of the lift cage.
• this requires special safety precautions, and in a preferred embodiment the lift cage has a vertically displaceable cross-rail being adapted in its lower position for fixating the pivotable side portion in vertical position.
• An example of use of the invention may be within the tower of a windmill.
• the invention is also useful in connection with other forms of building constructions, for example for construction site cranes, storage tanks, bridge piles, or the like.
• the inspection lift according to the invention may also be present as a load-bearing part of a building construction.
• the lift may comprise a number of sections which can be stacked on top of each other in use of the lift per se.
• the invention also relates to a safety arrangement the purpose of which is to prevent accidents, such as a person being hit by the lift cage, due to operational disorders or maloperation.
• sensing means are provided which are adapted for deactivating the motion of the lift cage if it hits an obstacle.
• Claims 18 and 19 set forth more details of sensing means for downward and upward motion, respectively.
• the invention also comprises a movable obstacle as stated in claim 20.
• the lift When the lift has a certain height, e.g. inside a windmill, it is normally divided into sections often being defined by plateaus. In particular in the building phase it may happen that persons are working on the ladder in certain sections while it would be desirable at the same time to be able to use the lift cage in other sections. This is possible with the lift and the safety arrangement according to the invention, as set forth in claims 20-26.
• the construction workers themselves can separately control where the lift cage cannot operate, e.g. in that each worker has his own padlock which can be fitted onto the obstacle which may be in the form of a safety rail.
• the obstacle can also have many other forms than a rail, e.g. a plate.
• the safety arrangement is general, see claim 24, since these advantages as to safety are obtained no matter whether the zone of movement for persons is within or outside the part of motion of the lift cage.
• figure 1 shows a side view of a preferred embodiment of an inspection lift according to the invention
• figure 2 shows a front view of the inspection lift from figure 1 ,
• figure 3 shows a top view of the inspection lift from figures 1 and 2 secured to a building section
• figure 4 shows perspective details of the inspection lift in figures 1 -3
• FIGS 5 and 6 show other embodiments of the inspection lift according to the invention.
• figure 7 shows a first safety arrangement according to the invention
• figure 8 shows a second safety arrangement according to the invention
• FIG 9 shows an embodiment of a safety rail according to the invention.
• 1 indicates a building section, e.g. a wall, to which a service ladder is secured by means of a number of consoles 2.
• the service ladder comprises side members 3 and 4 being interconnected by means of a number of ladder steps 5.
• the service ladder is positioned, by means of consoles 2 or the like, at such distance from the wall 1 that the wall constitutes a back rest for a person moving about on the service ladder. A personal work zone is thereby obtained which is safer than the known zones comprising the path of motion of the lift cage.
• the side members of the service ladder are used directly as guide for the lift cage, as a whole designated 6, see also figure 2.
• the cage can be a completely closed cage, but is shown in figures 1 and 2 as an open construction which comprises a vertical plate portion 7 ensuring that a person cannot get injured because of the steps 5, and which in the embodiment shown at the top carries a motor for a friction winch 8 and an arresting brake 9 which cooperates with appertaining steel wires respectively a carrier wire 10 and a safety wire 11.
• the friction winch 8 and the arresting brake 9 operate according to principles known per se, which for that reason will not be described in more detail, aside from the lift cage in a second embodiment being detachable thus allowing the friction winch 8 and the arresting brake 9 to be disengaged from the respective steel wires 10 and 11 , respectively.
• the lift cage 6 furthermore comprises a platform with sides for protecting a person on the platform.
• figure 1 , 12 indicates an operating panel being connected to control and safety circuits not shown
• figure 2 shows a gangway flap 13 which will be explained in more detail in connection with figures 3 and 4.
• Figure 3 shows a top view of the embodiment shown in figures 1 and 2 where the building section is shown as a curved wall corresponding to the inspect- ion lift possibly being positioned inside the tower of a windmill. Furthermore, figure 3 shows the operating panel 12 more clearly, and also how a number of guide rolls co-operate with the side members 3 and 4. There is a total of eight guide rolls of which the uppermost ones 14-17 can be seen in figure 3. Another pair of rolls 18 and 19 can be seen in figure 1. The rolls run on opposite sides of the side members 3 and 4 which constitute the guides for the inspection lift.
• the lift cage can be detachable from the guide rails as the guide rails are positioned on disengageable consoles which by means of operating handles 20 and 21 can easily be switched between a closed and an open position of the guide rolls.
• guide rolls there can also be used glide shoes, which, however, call for better fit.
• guide rolls larger tolerances are permitted i.a. in connection with the joints, which are unavoidable when a service ladder of a height of e.g. 50 m is assembled from a large number of ladder sections.
• Figure 4 shows more details of the lift cage 6 from the embodiment shown in figures 1 -3 (friction wench, arresting brake, and certain other previously described parts have been left out in figure 4).
• Figure 4 in particular shows how a gangway flap can be provided from the lift cage to a section of the building at a distance from the lift cage in that a side portion 13 is hinged at level with the platform of the lift cage thus allowing the portion 13 to be moved between the up position shown in full line and the down position shown in dotted line in figure 4.
• a knee rail or a hand rail 22 being connected to a pair of vertically extending lead pipes 23 and 24, which are displaceable along the corner pipes 25 and 26 of the lift cage.
• Figure 5 shows a second embodiment of the inspection lift according to the invention.
• the service ladder has side members 30 and 31 being interconnected by means of a ladder step 32.
• only one side member 31 is integrated with a guide side member for a lift cage 33, which is furthermore controlled by a guide rail 34 secured to a wall 35.
• the guide rail 31 may be stabilized either by cross-rails extending to the guide side member 34 or to the wall 35, and a portion corresponding to the gangway flap 13 may be provided, which can be flapped into the space defined between the wall 35 and the stairs 32, and which preferably constitutes the zone of action for the ladder.
• Figure 5 serves to schematically show that service ladder and the guide rails of the inspection lift may be disposed in different ways relative to each other and that either side of the ladder can be used as zone of action without the lift cage entering the zone of action.
• Figure 6 shows an example of a further possibility of the invention.
• Figure 6 illustrates a horizontal section through a lattice mast which comprises four steel profiles 40-43, one in each corner of the lattice mast.
• the steel profiles 40-43 serve as side members for a service ladder, which has steps 44
• the steel profiles 43 and 42 serve as guide rails for a lift cage 45.
• the corner profiles furthermore being interconnected by means of horizontal or inclined stiffeners 46-49 being positioned in mutually spaced vertical relationship.
• the embodiment shown in figure 6 is particularly well-suited for the version of the lift cage in which the guide rolls can be disengaged by means of operating handles 50 and 51 , see explanation in connection with the handles 20 and 21 in figure 3. It may e.g. be a matter of transmitter masts, which are to be serviced only occasionally, and it therefore suffices to invest in one single lift cage and optionally a spare cage in connection with servicing a large number of transmitter masts. In case of power failure or other malfunctions the service ladder which according to the invention is integrated with the guides for the inspection lift will ensure that risk of personal injury cannot arise when using the inspection lift, as persons in the work zone are completely outside the path of motion of the lift cage. This embodiment is a clear example that a zone of movement inside the mast is felt to be significantly more safe than having to move about on the outside of the mast where the lift cage operates.
• the embodiment shown in figure 6 can easily be modified into a construction site lift which can be erected according to need and be self-supporting. This can be obtained by dividing the construction into a number of sections which can be assembled in vertical position in the same manner as the tower for construction site cranes is erected. When erecting construction site cranes a second crane is needed for the lifting work, but in the lift according to the invention the lift cage may be adapted for being able to lift up the next section.
• the embodiments described in connection with figures 1-6 show various possibilities for the design of a lift where the ladder can be used in a safer way than is the case in the prior art technique.
• the lift cage may be provided with one or more outside steps or ledges in order the facilitate the way between the platform of the lift cage and the transport zone on the ladder.
• the invention furthermore relates to a safety arrangement which is to prevent accidents in case the lift cage because of malfunctioning moves towards a person in the zone of movement on the ladder.
• Figure 7 shows an embodiment of a safety arrangement intended for preventing accidents during the downward movement of the lift cage.
• the arrangement comprises a frame 60 suspended from swivel arms, of which the arms 61 and 62 can be seen.
• the swivel arms 61 and 62 are attached to a side member 65 which may be positioned on the lift cage as shown at 65 in figure 2.
• 67 and 68 schematically show bearing pins for guide rolls indicated in figure 2.
• the frame 60 has a position of rest being defined by a pair of stop pins 71 and 72, and when the frame is swung upwardly, the free end of the arm 62 will hit a change-over 70, which is connected to the control and safety equipment of the lift. When the frame 60 swings up, the lift can thus be stopped practically instantaneously.
• the guide 73 schematically indicates a portion of the guides for the guide rolls of the lift cage, and it is noted that the guide is located between a throughgoing rod 74 extending between the opposing sides of the frame 60 and a tap 75 extending a relatively short distance inwardly towards the centre of the lift cage.
• the rod 74 serves as bearing for the opposing arms 62, and on the opposite side of the frame 60 there is also provided a tap corresponding to the tap 75.
• the safety arrangement in figure 7 functions in the following way. If a person is on the ladder (73) this person may typically hold his hands round a ladder step, which is indicated at 76. If the lift cage is on its way down, then the thoroughgoing rod 74 will hit the hands, the frame will be lifted up, and the change-over 70 will instantaneously cause the lift cage to stop. If the person happens to be gripping round the guides 73 instead of a step, then the taps 75 will hit his hand, and the lift cage will also stop.
• Figure 8 shows an embodiment of the safety arrangement according to the invention, the purpose of said embodiment being to prevent accidents when the lift cage is on its way up.
• the arrangement is preferably located at the top of the lift cage near the ladder. This can be understood in that one 77 of the guide rolls 77 and 78 shown in figure 8 is also indicated in figure 2.
• Figure 8 shows a vertically displaceable plate 79 having guide grooves for adoption of guide taps 80-83, and by means of a spring 84 the plate is retained in its uppermost position. If the plate 79 is pressed downwardly, an inclined path 85 will affect an electric change-over 86 connected to the control and safety equipment of the lift to the effect that the motion of the lift cage can be stopped virtually instantaneously. This is relevant when a person is standing with his feet on the ladder and the lift cage because of malfunctioning moves up towards that person. The upper edge of the plate 79 will hit his feet, and the lift cage will stop at once, as described.
• the safety arrangement also comprises a movable obstacle which is shown schematically in figure 9.
• the profile 90 indicates an elongated profile, seen from the end.
• the length and inside cross-section of the profile correspond to the length and outside cross- section of the ladder steps, and 91 indicates a longitudinally extending hinge, and 92 shows a padlock.
• the profile can be opened and placed around/be removed from a ladder step.
• the profile furthermore has a number of taps 93 being intended for extending into the path of motion of the lift cage precisely at such locations where the lift cage has activation arms for electric change-overs being connected to the control and safety equipment of the lift.
• the taps 93 can also be positioned so as to co-operate with safety arrangements of the kind described in connection with figures 7 and 8.
• the profile can have holes for adoption of many padlocks, which has the advantages described below.
• the area in which the lift cage must not operate can be delimited at the top and at the bottom by a profile 90, and the persons working in that area each have their separate padlock which they place in the profile. Not until everyone has removed their padlocks can the profiles 90 be removed and the lift cage can pass again.
• the safety arrangement can be made in many ways and that it lies within the scope of the invention to replace the electric change-overs described by other known forms of detection principle, e.g. magnetic, optical, or other form of detection.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• General Engineering & Computer Science (AREA)
• Ladders (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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ID=8160592

Family Applications (1)

Country Status (2)

Cited By (8)

Citations (7)

• 2002
  • 2002-06-28 WO PCT/DK2002/000442 patent/WO2003002447A1/en not_active Application Discontinuation
  • 2002-06-28 EP EP02754546A patent/EP1414731A1/de not_active Withdrawn

Patent Citations (7)

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